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Simplifying 10cos(2x) + -5cos(3x) = 0 Remove parenthesis around (2x) 10cos * 2x + -5cos(3x) = 0 Reorder the terms for easier multiplication: 10 * 2cos * x + -5cos(3x) = 0 Multiply 10 * 2 20cos * x + -5cos(3x) = 0 Multiply cos * x 20cosx + -5cos(3x) = 0 Remove parenthesis around (3x) 20cosx + -5cos * 3x = 0 Reorder the terms for easier multiplication: 20cosx + -5 * 3cos * x = 0 Multiply -5 * 3 20cosx + -15cos * x = 0 Multiply cos * x 20cosx + -15cosx = 0 Combine like terms: 20cosx + -15cosx = 5cosx 5cosx = 0 Solving 5cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '5'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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